hisi_acc_vfio_pci: resolve duplicate migration states

[ Upstream commit 8c6ac1730a977234dff74cc1753b4a953f59be7b ]

In special scenarios involving duplicate migrations, after the
first migration is completed, if the original VF device is used
again and then migrated to another destination, the state indicating
data migration completion for the VF device is not reset.
This results in the second migration to the destination being skipped
without performing data migration.
After the modification, it ensures that a complete data migration
is performed after the subsequent migration.

Signed-off-by: Longfang Liu <liulongfang@huawei.com>
Link: https://lore.kernel.org/r/20260122020205.2884497-4-liulongfang@huawei.com
Signed-off-by: Alex Williamson <alex@shazbot.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c b/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c
index d1e8053640a98cec785dba6e260afda497012f67..8a05fb91929fb6e67b2a68cfdc5e254bef0836e4 100644 (file)
--- a/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c
+++ b/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c
@@ -1570,6 +1570,7 @@ static int hisi_acc_vfio_pci_open_device(struct vfio_device *core_vdev)
                }
                hisi_acc_vdev->mig_state = VFIO_DEVICE_STATE_RUNNING;
                hisi_acc_vdev->dev_opened = true;
+               hisi_acc_vdev->match_done = 0;
                mutex_unlock(&hisi_acc_vdev->open_mutex);
        }